BDRA: Big Data Reference Architecture.Big Data Analytics: It is the process of inspecting huge amount of varied data to uncover hidden patterns, unknown correlations and to extract valuable information using advanced analytic techniques and business intelligence tools.Big Data: Big data is a general term used to describe the voluminous amount of unstructured and semi-structured data a company creates, data that would take too much time and cost to load into a relational Database for analysis.Cloud Analytics: any analytics initiative in which one or more of the following elements is implemented in the “cloud” qualifies as Cloud Analytics: Data Sources, Data Models, Processing Applications, Computing Power, Analytic Models, and Sharing or Storage of Results.Hadoop: It is an open source apache framework for crunching database, made of two main components: HDFS and MapReduce.HDFS: HDFS is an important part of Hadoop and is an abbreviation of Hadoop Distributed File System (HDFS), which stores data in files on a cluster of servers.Map Reducing: Map Reducing is an important part of Hadoop and it is a programming framework for building parallel applications that run on HDFS.NoSQL Database: is also called as “Not Only SQL” Database. NoSQL is the name given to a broad set of Databases whose only common thread is that they don’t require SQL to process data, although some support both SQL and non-SQL forms of data processing.